Rotary cutter-head for heel-trim mlnd machines



No. 625,728. Patented May 23, I899.

M. T. HABRIGAN. ROTARY CUTTER HEAD FOR HEEL TRIMMING MACHINES.

(Application filed Apr. 19, 1898;)

(No Model.)

15106 .Mc'ckae Idor: l an,

UNITED STATES i PATENT @FFIGE.

MICHAEL T. HARRIGAN, OF XVOLLASTQN, MASSACHUSETTS, ASSIGNOR TO THEMOKAYSHOE MACHINERY'COMPANY, OF PORTLAND, MAINE.

ROTARY CUTTER-HEAD FOR- HEEL-'TR|MM|NG MACHINES SPECIFICATION formingpart of Letters Patent No. 625,728, dated May 23, 1899'.

Application filed April 19, 1399.

To all whom it ta/y concern:

Be it known that I, IVIICHAEL T. HARRIGAN, of Wollaston, county ofNorfolk, State of Massachusetts, have invented an Improvement in RotaryCutters for Trimming Heels, &c., of, Boots or Shoes, of whichthefollowing de scription, in connection with the accompany-' ing drawings,is a specification, like letters. and figures on the drawingsrepresenting like I parts.

tially, of a plate or disk having at its center a hub and a series ofdetachable pivoted blocks having grooves to receive a suitable pinextended from a foot projected inwardly from the plate, said blocksbeing under the control of clamping-screws, whereby they may be made toclasp and hold each blade in adjusted position; I have herein shown theblocks as being capable of being held in three positions 'to therebyincrease or decrease the clearanc of the blades.

Figure 1 is a section taken through the cutter-head and rand-guideembodying my invention. Fig. 2 is a face view of the cutterhead with therand-guide detached. Fig. 3 is a detail looking at the left-hand side ofthe cutter-head shown in Fig. 1, a part of the ring at the back beingbroken out. Fig. 4 is a rear side view of the disk carrying the blocksholding the blades. Fig. 5isasection through said disk in the line 00Fig. 6 isa face view of the disk. Fig. 7 is an inner side view of one ofthe clamps employed to hold the individual blades. Fig. 8 is a sectionof said clamp. Fig. 9 shows a face view of one of said blades, and Fig.10 is a section of a blade.

Referring to the drawings, let A represent any usual rotary shaft of aheel-trimming or other machine, B a usual rand-guide, and C a screwextended through a hole in the center of said randguide and screwed intoa Serial No. 678,153. (No model.)

as herein shown, a series of holes 1 2 3. The

succession of shoulders cl, over and about which is fitted a ring d saidring running against the top lift of the heel. This ring is shown inposition inFigs. 1 and 3, and it is held in place on the disk by meansof suitable screws cl said screws being herein represented as'havingtheir heads cut away, leaving a secant-line at one side, so that when Myimproved cutter-head consists, essensaid heads are turned and the saidsecant-line coincides with the inner edge of the ring where it meets thedisk the ring maybe freely removed from the disk, thus leaving the endsof the cutter-blades in position that access may be had to them to grindthem.

of their length, and each blade has extended inwardly from one sidethereof near its center a web or foot c, said footbeing provided with atongue c said tongue following the line of curvature of the face of thecutter.

For each blade c there is a clamping-block fiand each clamping-block iscut away to leave a shoulder f, and said shoulder at its inner side isprovided with a groove f to receive and embrace closely the tongue (2 ofthe cutter-blade. Each clamp has a screw-hole, as f through which isextended loosely a screw 1, said screw entering the threaded opening (1.Each clamp has in practice a pin, as f, and said pin is adapted to entereither of the holes 1, 2, or 3 of the disk, said pin by entering one orthe other of said holes determining the amou ntof clearance of eachblade. By turning the screws f in snugly the clamps in engagement withthe tongue efiect the firm clamping of the blades in position.

The grooves in the clamp and the tongues when the cutter-blades areassembled, as represented in Fig. 2,-occupy positions eccentric withrelation to the center of rotation of the shaft A.

tion of grinding, they may be adjusted longitudinally in the grooves ofthe clamps. Each disk D has clearance-spaces 01 Having fully describedmy invention, what I claim as new, and desire to secure by LettersPatent, is-

1. A rotary cutter-head composedof a disk plate D at its rear side iscutaway to leave a As the blades are worn away in the opera The blades 6are convexed in the direction having clearance-spaces, a series ofblades having feet provided each with a tongue, a series of independentdetachable clamps shaped to engage said tongues and feet, and screws toenter said clamps and confine them in position on said disk,substantially as described.

2. A rotary cutter-head composed of a disk having a clearance-space, aseries of clamps having grooves and a series of blades having feet, eachprovided with a tongue, the grooves of the clamps engaging the saidtongues, and means to operatesaid clamps to engage and hold the bladesfirmly in position, substantially as described.

3. A eutter-head composed of a disk or plate, a series of clamps, and aseries of cutters held in position through the action of tongues andgrooves; combined with a ring detachabl y secured to said disk or plate,whereby when the ring is removed the blades are exposed in position tobe ground.

4. Acutter-head,composed of adisk orplate having an attached ring, aseries of blades having tongues, a series of detachable clamps, means toforce said clamps toward said disk or plate to clamp the blades firmlyin position, and a rand-guard substantially as described.

5. A disk or plate having screw-threaded openings, and one or more pinreceivin g open ings, and a series of clamps each having a groove,combined with a series of blades each having a tongue, and a series ofscrews entering said threaded openings to hold said clamps in operativeposition each of said clamps having a pin to enter one of the saidseries of holes in the disk or plate preparatory to forcing the clampsinto their operative position, substantially as described.

6. A rotary cutter-head composed of a disk having clearance-spaces,andshouldered at d, a ring applied to said shouldered part, means toconfine said ring on said disk, a series of cutter-blades having each aprojecting foot, and a series of independent detachable clamps,said feetbeing engaged and prevented from tipping by said clamps, and means tohold said clamps in place on said disk, substantially as described.

In testimony whereof I have signed my name to thisspecification in thepresence of two subscribing witnesses.

MICHAEL T. HARRIGAN.

Witnesses:

J. CoUPER EDWARDS,- AUGUSTA E. DEAN.

